IP Library › Granted Patent US 4,892,968
Granted Patent Utility
US 4,892,968 · App. 07/226,008

3,3'-Dichloro-4,4-diaminodiphenyl sulfonic acids

Inventor: Colin D. Campbell
Patented Case View Patent ↗
Granted: Jan 9, 1990 Filed: Jul 29, 1988
Inventor
Colin D. Campbell
Assignee (at issue)
Ciba-Geigy

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Quick Facts
Patent No.
US 4,892,968
App. No.
07/226,008
Filed
1988-07-29
Granted
1990-01-09
Kind
A